Lango has to be one of the most unintenionally pathetic and non-threatening villains in the franchise. They created a cure for the hypnosis before he even got his hands on the hypnosis gun, making his acquisition of it essentially pointless, he just isn't aware of it yet. They're tanking his Press production immediately after he takes over as final boss, all he will have left are the Presses that had already been sent to Stomach Inc. by the time Shouma distributes the cure, and the heroes are already on their way to plunder the factory next episode. Dude's plan was undermined before he even became the final boss.

All he can do now is fight, but he's not even at the top of the power scale at this point, he'll have to pray Shouma can't gain access to any of his final forms within the next 2 episodes.